| 摘要 |
PURPOSE: A heat inlet preventing device is provided to prevent condensed heat of a machine room from lifting through a defrosting hose during driving of refrigerating cycle for saving energy and improving refrigerating efficiency. CONSTITUTION: When a defrost heater is operated, a piston(24) descends to open a drain outlet(22) for discharging defrost water. In a refrigerant circulation process, frost is formed on a fin and a pipe of an evaporator causing a refrigerating cycle device to stop. A defrost heater fixed adjacent to the evaporator is operated for a specific time for melting frost. Defrost water is collected to a drain dish and flows down via a defrost hose(12) to be collected to a defrost water collector. A fan motor or a motor of a machine room is operated thus a drive unit(23) interlocked therewith is operated to raise up a position of a piston(24). The drain outlet(22) is closed for interception of inlet of condensed heat inside the machine room toward a refrigerating room through the defrost hose(12).
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